- RTJ Joints are machined metal rings in accordance with the standards established by the American Petroleum Institute (API) and the American Society of Mechanical Engineers (ASME), for applications in high pressure and temperature situations. - A typical application of the -Joints is the Christmas Tree, used in oil production field. The seal is obtained at a contact line, by wedging action, causing high crushing pressure and, thereby forcing the material to leak in this area. The small seal area, with the high contact pressure, results in great reliability. However, the joint and flange contact surface must be carefully machined and finished. Some types are activated by pressure, meaning that, the higher the pressure, the greater the sealability. MATERIALS The materials must be forged or laminated. Cast materials should not be used. The table 1 shows the standardized materials according to ASME B 16.20 standard and API6A for Joints. Material Maximum Hardness Brinell Maximum Hardness Rockwell B ID Soft Iron 90 56 D Carbon Steel 120 68 S AISI 502 130 72 F5 AISI 410 170 86 S410 AISI 304 160 83 S304 AISI 316 AISI 347 Monel Inconel 160 160 125 120 83 83 70 68 S306 S347 M N a) According to the API6A standard, the soft iron and carbon steel ring must be galvanized with a layer of 0,0002 to 0,0005. b) Each material code is specified in the joint next to the size reference, as indicated by API6A and ASME B16.20 standards.
Oval Joint - Solid, projected for RTJ flanges, in accordance to ASME B16.20 and API6A Standards. - Used for high pressure in general, drilling, extraction and oil processing, bonnet valves and general piping. Octagonal Joint Solid, building and usage characteristics similar to 8410, however, due to its shape, it maintains greater sealing. More recommended for the flanges manufactured today. Class and Standard 1/2 24 inches 26 36 inches 26 36 inches 150 2500 ASME B16.5 and BS1560 300 600 MSS SP44 and BS3293 900 MSS SP44 R Oval Series R Octagonal Series 1-1/2 20 inches API Spec. 6A Tolerance Width... ±0.008 Height... +0.05, -0.02 Pico (machine tolerance)... ±0.007 Width... ±0.008 Height... +0.05, -0.02 Plano (machine tolerance)... ±0.008 Passo (machine tolerance)... ±0.007 23 o angle... ±0.5
RX Joint Shape speacially designed for use the internal pressure as a aid to sealling. The external face of the ring makes the incial contact with the flange, making the crushing and sealing. As the internal pressure of the line or equipment increase, the same happens with the contact between the ring and the flange, increasing the efficiency of the sealing. This characteristic makes this type more resistant to vibrations that occur during the drilling and sudden rises of pressure and impact, commonly seen in oil field work. The 9653 RX type is totally interchangeable with the 950 and 951 types, using the same accomodation in the flange channel and reference number. Tolerance 1-1/2 20 inches Class and Standard 720 5000 API 6B Flanges A... +0.008, -0.000 H... +0.008, -0.000 OD... +0.010, -0.000 C... +0.006, -0.000 D... +0.000, -0.030 E... ±0.02 23... ±1/2 BX Joint This ring has square sections with beveled corners. Designed to use only in API 6BXS flanges, in pressures from 2.000 to 20.000 PSI. The ring average diameter is lightly bigger than the flange s accomodation. So, the ring to be built stays pré-compressed by the external diameter, creating a sealing elevation effect with the increase of the operation pressure. The fittings that use BX 952 ring has a small interference. The ring is effectively stamped by the flange s accomodations and it can not be reused. Tolerance 1-11/16 21-1/4 inches A... +0.008, -0.000 H... +0.008, -0.000 D... ± 0.02 OD... +0.000, -0.005 ODT... ±0.002 C... +0.006, -0.000 23... ± 1/4 Class and Standard 5000 0 API 6BX Flanges
HARDNESS It is recommended that the hardness of the ring is always less than the flanges, in order to not damage it. This difference should be at least 30HB. MANUFACTURING S DIMENSIONING AND TOLERANCE When specifying the -Joint application, it is recommended to follow the standards indicators found below which give the dimensions, tolerances and the application tables. ASME B16.5 Steel Pipe-Line Flanges ASME B16.20 Metallic Gaskets for Pipe Flanges ASME B16.47 Steel Pipe-Line Flanges API 6A Specification for Wellhead Equipment. API 6B Specification for Wellhead Equipment. API 6D Steel Gate, Plug, Ball and Check Valves for Pipe-Line Service. The Tightness factor M and Minimum Crushing Y Type M Y (psi) Carbon Steel 5,50 18.000 Stainless Steel 6,50 26.000 Monel 6,00 21.800 The Tightness Factor M and Minimum Crushing Y of a sealing material are the factors to be considering when the torque calculations of a joint gasket. They are experimentally parameters determined through laboratory result analysis relative to inherent characteristics of each specific material and according to the criteria apllied by the manufacturer. The ASME code s Division 1 Chapter VIII Appendix 2 establishes parameters for the joints designs with generic values of characteristics M (tightness factor, wich is always a dimensionless Constant) charascteristics and Y (Minimum crushing value) of the joint.
BX series manufactured according to ASME B 16.20 API Spec. 6ª standard GASKET DIMENSIONS CLASS N I/D O/D Height 3000 5000 10000 15000 0 BX150 2.110 2.842 0.366 1.11/16 1.11/16 BX151 2.250 3.008 0.379 1.13/16 1.13/16 BX152 2.528 3.334 0.403 2.1/16 2.1/16 2.1/16 BX153 3.078 3.974 0.448 2.9/16 2.9/16 2.9/16 BX154 3.624 4.600 0.488 3.1/16 3.1/16 3.1/16 BX155 4.705 5.825 0.560 4.1/16 4.1/16 4.1/16 BX156 7.901 9.637 0.733 7.1/16 7.1/16 7.1/16 BX157 9.941 11.593 0.826 9 9 BX158 12.038 13.860 0.911 11 11 11 BX159 14.776 16.800 1.012 13.5/8 13.5/8 13.5/8 BX160 14.768 15.850 0.938 13.5/8 BX161 18.071 19.347 1.105 16.3/4 BX162 17.600 18.720 0.560 16.3/4 16.3/4 16.3/4 BX163 20.528 21.896 1.185 18.3/4 BX164 20.527 22.463 1.185 18.3/4 18.3/4 BX165 23.139 24.595 1.261 21.1/4 BX166 23.140 25.198 1.261 21.1/4 BX167 28.864 29.896 1.412 26.3/4 BX168 28.864 30.138 1.412 26.3/4 BX169 5.813 6.831 0.624 5.1/8 BX170 7.464 8.584 0.560 6.5/8 6.5/8 BX171 9.409 10.529 0.560 8.9/16 8.9/16 BX172 11.993 13.113 0.560 11.5/32 11.5/32 BX303 32.237 33.573 1.494 30 30
R series are manufactured according to ASME B 16.20 API Spec. 6ª BS EM 12560-5 standard FLANGE NOMINAL DIAMETER (inches) FLANGE NOMINAL DIAMETER (inches) General Application Oil Field Joint Weight (kg) General Application Oil Field Joint Weight (kg) ANSI e API nº Series Series Series Series Series Series Series 150 300, 400 e 600 900 1500 2500 720, 960, e 3000 5000 Oval Octagonal ANSI e API nº Série Series Série Series Série Series Série Series Série Series Série Series Série Series 150 300, 400 e 600 900 1500 2500 720, 960, e 3000 5000 Oval Octagonal R11 1/2 0,050 0,045 R12 1/2 1/2 0,100 0,090 R13 3/4 1/2 0,105 0.100 R14 3/4 3/4 0,110 0,105 R15 1 0,120 0,110 R16 1 1 1 3/4 1 1 0,125 0,115 R17 1 1/4 0,140 0,130 R18 1 1/4 1 1/4 1 1/4 1 1 1/4 1 1/4 0,150 0,140 R19 1 1/2 0,160 0,150 R20 1 1/2 1 1/2 1 1/2 1 1/2 1 1/2 0,170 0,155 R21 1 1/4 0,300 0,290 R22 2 0,205 0,190 R23 2 1 1/2 2 0,340 0,335 R24 2 2 2 0,395 0,385 R25 2 1/2 0,250 0,230 R26 2 1/2 2 2 1/2 0,420 0,410 R27 2 1/2 2 1/2 2 1/2 0,475 0,435 R28 2 1/2 0,570 0,560 R29 3 0,280 0,260 R30* 3 0,490 0,475 R31 3 3 3 0,510 0,500 R32 3 0,650 0,635 R33 3 1/2 0,325 0,300 R34 3 1/2 3 1/2 0,545 0,530 R35 3 3 0,565 0,550 R36 4 0,370 0,335 R37 4 4 4 3 1/2 0,615 0,605 R38 4 1,160 1,145 R39 4 4 0,670 0,655 R40 5 0,425 0,390 R41 5 5 5 0,755 0,730 R42 5 1,910 1,885 R43 6 0,480 0,440 R44 5 5 0,805 0,785 R45 6 6 6 0,875 0,855 R46 6 6 1,085 1,055 R47 6 2,295 2,265 R48 8 0,610 0,560 R49 8 8 8 1,120 1,090 R50 8 8 1,995 1,960 R51 8 3,650 3,705 R52 10 0,755 0,695 R53 10 10 10 1,360 1,305 R54 50 10 2,400 R55 10 7,360 7,736 R56 12 0,940 0,870 R57 12 12 12 1,580 1,535 R61 14 14 1,740 1,690 R62 14 3,105 3,050 R63 14 7,350 7,560 R64 16 1,120 1,044 R65 16 16 1,950 1,895 R66 16 3,480 3,415 R67 16 10,115 10,615 R68 18 1,280 1,180 R69 18 18 2,210 2,150 R70 18 5,350 5,280 R71 18 11,430 12,020 R72 20 1,380 1,275 R73 20 20 2,995 2,935 R74 20 5,875 5,785 R75 20 15,105 16,010 R76 24 1,660 1,535 R77 24 5,125 5,035 R78 24 12,290 12,510 R79 24 22,090 22,565 R80 22-1,410 R81 22-3,880 R82 1-0,230 R84 1 1/2-0,255 R85 2-0,445 R86 2 1/2-0,655 R87 3-0,725 R88 4-1,240 R89 3 1/2-1,145 R90 5-2,065 R91 10-6,825 R93 26-7,405 R94 28-7,910 R95 30-8,480 R96 32-12,090 R97 34-12,760 R98 36-13,515 R99 9-0,945 R100 26-16,900 R101 28-21,000 R102 30-23,400 R103 32-25,000 R104 34-31,500 R105 36-33,400
RX series are manufactured according to ASME B 16.20 API Spec. 6ª standard N GASKET DIMENSIONS I/D O/D Height 720-900 CLASS 2900 3000 5000 N GASKET DIMENSIONS I/D O/D Height 720-900 CLASS 2900 3000 5000 RX20 2.313 3000 0.75 1.1/2 0,045 1.1/2 RX23 2.672 3.672 1 2 RX24 3.234 4.172 1 2 2 RX25 3.625 4.313 0.75 3.1/8 RX26 3.469 4.406 1 2.1/2 RX27 3.719 4.656 1 2.1/2 2.1/2 RX31 4.359 5.297 1 3 3 RX35 4.859 5.797 1 3 RX37 5.359 6.297 1 4 4 RX39 5.859 6.797 1 4 RX41 6.609 7.547 1 5 5 RX44 7.109 8.047 1 5 RX45 7.797 8.734 1 6 6 RX20 2.313 3.000 0.75 1.1/2 1.1/2 RX23 2.672 3.672 1 2 RX24 3.234 4.172 1 2 2 RX25 3.625 4.313 0.75 3.1/8 RX26 3.469 4.406 1 2.1/2 RX27 3.719 4.656 1 2.1/2 2.1/2 RX31 4.359 5.297 1 3 3 RX35 4.859 5.797 1 3 RX37 5.359 6.297 1 4 4 RX39 5.859 6.797 1 4 RX41 6.609 7.547 1 5 5 RX44 7.109 8.047 1 5 RX45 7.797 8.734 1 6 6 RX46 7.688 8.75 1.125 6 RX47 8.094 9.656 1.625 8 RX49 10.109 11.047 1 8 8 RX50 9.844 11.156 1.25 8 RX53 12.234 13.172 1 10 10 RX54 11.969 13.281 1.25 10 RX57 14.484 15.422 1 12 12 RX63 15.266 17.391 2 14 RX65 17.984 18.922 1 16 RX66 17.719 19.031 1.25 16 RX69 20.484 21.422 1 18 RX70 20.094 21.656 1.625 18 RX73 22.406 23.469 1.25 20 RX74 22.094 23.656 1.625 20 RX82 1.734 2.672 1 1 RX84 1.984 2.922 1 1.1/2 RX85 2.484 3.547 1 2 RX86 2.891 4.078 1.125 2.1/2 RX87 3.266 4.453 1.125 3 RX88 4.109 5.484 1.25 4 RX89 3.672 5.109 1.25 3.1/2 RX90 5.188 6.875 1.75 5 RX91 8.922 11.297 1.781 10 RX99 8.734 9.672 1 8 8 RX201 1.573 2.026 0.445 1.3/8 RX205 2.016 2.453 0.437 1.13/16 RX210 3.094 3.844 0.75 2.9/16 RX215 4.609 5.547 1 4.1/16